Abstract
Originalsprog | Engelsk |
---|---|
Tidsskrift | Nature Cell Biology |
Vol/bind | 10 |
Udgave nummer | 11 |
Sider (fra-til) | 1309-17 |
Antal sider | 8 |
ISSN | 1465-7392 |
DOI | |
Status | Udgivet - 2008 |
Bibliografisk note
Keywords: Apoptosis; Carcinoma; Cell Line; Cell Survival; Genes, Reporter; Glutathione Transferase; Humans; Inhibitor of Apoptosis Proteins; Kidney; Liver Neoplasms; Luciferases; NF-kappa B; Neoplasms; Plasmids; Protein Binding; Protein Structure, Tertiary; Recombinant Fusion Proteins; Transfection; Tumor Necrosis Factor-alpha; UbiquitinAdgang til dokumentet
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I: Nature Cell Biology, Bind 10, Nr. 11, 2008, s. 1309-17.
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - IAPs contain an evolutionarily conserved ubiquitin-binding domain that regulates NF-kappaB as well as cell survival and oncogenesis
AU - Gyrd-Hansen, Mads
AU - Darding, Maurice
AU - Miasari, Maria
AU - Santoro, Massimo M
AU - Zender, Lars
AU - Xue, Wen
AU - Tenev, Tencho
AU - da Fonseca, Paula C A
AU - Zvelebil, Marketa
AU - Bujnicki, Janusz M
AU - Lowe, Scott
AU - Silke, John
AU - Meier, Pascal
N1 - Keywords: Apoptosis; Carcinoma; Cell Line; Cell Survival; Genes, Reporter; Glutathione Transferase; Humans; Inhibitor of Apoptosis Proteins; Kidney; Liver Neoplasms; Luciferases; NF-kappa B; Neoplasms; Plasmids; Protein Binding; Protein Structure, Tertiary; Recombinant Fusion Proteins; Transfection; Tumor Necrosis Factor-alpha; Ubiquitin
PY - 2008
Y1 - 2008
N2 - The covalent attachment of ubiquitin to target proteins influences various cellular processes, including DNA repair, NF-kappaB signalling and cell survival. The most common mode of regulation by ubiquitin-conjugation involves specialized ubiquitin-binding proteins that bind to ubiquitylated proteins and link them to downstream biochemical processes. Unravelling how the ubiquitin-message is recognized is essential because aberrant ubiquitin-mediated signalling contributes to tumour formation. Recent evidence indicates that inhibitor of apoptosis (IAP) proteins are frequently overexpressed in cancer and their expression level is implicated in contributing to tumorigenesis, chemoresistance, disease progression and poor patient-survival. Here, we have identified an evolutionarily conserved ubiquitin-associated (UBA) domain in IAPs, which enables them to bind to Lys 63-linked polyubiquitin. We found that the UBA domain is essential for the oncogenic potential of cIAP1, to maintain endothelial cell survival and to protect cells from TNF-alpha-induced apoptosis. Moreover, the UBA domain is required for XIAP and cIAP2-MALT1 to activate NF-kappaB. Our data suggest that the UBA domain of cIAP2-MALT1 stimulates NF-kappaB signalling by binding to polyubiquitylated NEMO. Significantly, 98% of all cIAP2-MALT1 fusion proteins retain the UBA domain, suggesting that ubiquitin-binding contributes to the oncogenic potential of cIAP2-MALT1 in MALT lymphoma. Our data identify IAPs as ubiquitin-binding proteins that contribute to ubiquitin-mediated cell survival, NF-kappaB signalling and oncogenesis.
AB - The covalent attachment of ubiquitin to target proteins influences various cellular processes, including DNA repair, NF-kappaB signalling and cell survival. The most common mode of regulation by ubiquitin-conjugation involves specialized ubiquitin-binding proteins that bind to ubiquitylated proteins and link them to downstream biochemical processes. Unravelling how the ubiquitin-message is recognized is essential because aberrant ubiquitin-mediated signalling contributes to tumour formation. Recent evidence indicates that inhibitor of apoptosis (IAP) proteins are frequently overexpressed in cancer and their expression level is implicated in contributing to tumorigenesis, chemoresistance, disease progression and poor patient-survival. Here, we have identified an evolutionarily conserved ubiquitin-associated (UBA) domain in IAPs, which enables them to bind to Lys 63-linked polyubiquitin. We found that the UBA domain is essential for the oncogenic potential of cIAP1, to maintain endothelial cell survival and to protect cells from TNF-alpha-induced apoptosis. Moreover, the UBA domain is required for XIAP and cIAP2-MALT1 to activate NF-kappaB. Our data suggest that the UBA domain of cIAP2-MALT1 stimulates NF-kappaB signalling by binding to polyubiquitylated NEMO. Significantly, 98% of all cIAP2-MALT1 fusion proteins retain the UBA domain, suggesting that ubiquitin-binding contributes to the oncogenic potential of cIAP2-MALT1 in MALT lymphoma. Our data identify IAPs as ubiquitin-binding proteins that contribute to ubiquitin-mediated cell survival, NF-kappaB signalling and oncogenesis.
U2 - 10.1038/ncb1789
DO - 10.1038/ncb1789
M3 - Journal article
C2 - 18931663
SN - 1465-7392
VL - 10
SP - 1309
EP - 1317
JO - Nature Cell Biology
JF - Nature Cell Biology
IS - 11
ER -